ADS rfc error at Java system

Dear Experts,

we have ADS configured  between source ABAP and ADS running on Java.

RFC on ABAP is working fine with everything as mentioned below :

Setting Up Basic Authentication to ADS in an ABAP Environment - Configuring Adobe Document Services for Form Processing …

but the ADS rfc on Java system   is giving  this error

Thanks in advance.

Kind Regards,

Domnic